Monitor Configuration
Please enter your monitor specs. If you don't know one of these,
leave it blank. This information is used to generate warnings if the
requested mode is outside your monitor's capabilities. These values
are not required.

Horizontal Sync RateThe number of scan lines (visible and invisible) that are
drawn on the screen per second.

kHz min kHz max

Refresh RateAlso known as the Vertical Sync Rate, this is the number
of screen refreshes per second.

Hz min Hz max

Dot Clock FrequencyAlso known as the Pixel Clock, this is the speed at which
pixels are drawn on the screen.

MHz maximum

Basic Configuration
For the best Refresh Rate, fill in all fields except Refresh Rate. For
maximum resolution, set both Horizontal and Vertical Resolution to zero.

Visible ResolutionThis setting determines how many pixels will be visible
onscreen. If both horizontal and vertical resolution are zero, the maximum
possible resolution given the Refresh Rate, Dot Clock, and Aspect Ratio
will be used.

xpixels

Refresh RateAlso known as the Vertical Sync Rate, this is the number
of screen refreshes per second. Low values may cause a flickering effect,
while higher values produce a more stable display.

Hz (actually 0)

Dot Clock FrequencyAlso known as the Pixel Clock, this is the speed at which
pixels are drawn on the screen.

MHz

Constrain Aspect RatioConstrains the visible resolution to a given aspect ratio.
The typical CRT ratio is 4/3. This feature works
best with JavaScript.

/

InterlaceInterlace draws only half of the screen each refresh,
doubling the effective refresh rate. Interlaced modes are well known for
their high flicker, but a 60Hz interlaced mode looks much better than a
30Hz non-interlaced mode.

interlace

DoublescanDoublescan draws every line on the screen twice, doubling
the effective dot clock and allowing lower resolutions. This is often
necessary for modes like 320x200.

doublescan

Advanced Configuration
Do not change the following sync times unless you know what you're doing.
These almost never need changing.

Horizontal Sync TimeThis should vary from 3.5 to 4.0, with 3.8 being a fairly safe bet.

microseconds

Vertical Sync TimeThis should vary from 50 to 300, with 150 being a fairly safe bet.